AirHint found the following cheapest return flights from Osaka (KIX) to Phnom-penh (PNH) in September 2025 (see full year).

Return flights

01 Sep - 08 Sep	Xiamen Airlines
11 Sep - 15 Sep	China Southern
13 Sep - 17 Sep	Air China
07 Sep - 14 Sep	Air China
08 Sep - 15 Sep	Peach
10 Sep - 16 Sep	Peach
15 Sep - 10 Oct	Thai AirAsia X
12 Sep - 16 Sep	Peach
01 Sep - 22 Sep	Peach
05 Sep - 17 Oct	Air China
10 Sep - 19 Sep	Air China
15 Sep - 19 Sep	Thai AirAsia X
27 Sep - 11 Oct	Thai AirAsia X
15 Sep - 04 Oct	Thai AirAsia X
27 Sep - 18 Oct	Thai AirAsia X
27 Sep - 04 Oct	Thai AirAsia X
13 Sep - 04 Oct	Thai AirAsia X
03 Sep - 17 Oct	Air China
05 Sep - 20 Oct	Thai AirAsia X
27 Sep - 07 Oct	Thai AirAsia X

Also check the deals for one-way flights from Osaka to Phnom-penh in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Osaka to Phnom-penh in September from 309€

Return flights